The CD protection "VOB Protect CD", which is often used here in Germany for games and applications, can be 1:1 reproduced by a Plextor Premium CD Writer.
This only works with BW 4, because only BW 4 always writes the topology if I want it. So I think it doesn´t make any sense to limit functionality of BW 5/6 to only write securom topology. Some more freedom of choice for the user may be helpful. Users love it to experiment, which sometimes leads to unexpected success...